Exechia afroparva Lindemann, 2021

Lindemann, Jon Peder, Soli, Geir & Kjaerandsen, Jostein, 2021, Revision of the Exechia parva group (Diptera: Mycetophilidae), Biodiversity Data Journal 9, pp. 67134-67134 : 67134

Exechia afroparva Lindemann sp. n.

Materials

Type status: Holotype. Occurrence: catalogNumber: TSZD-JKJ-107225 ; occurrenceRemarks: BMSA(D): 26650; recordedBy: A.H. Kirk-Spriggs; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Burundi; stateProvince: Kayanza prov.; municipality: Rwegara; locality: Parc National de la Kibira ; verbatimElevation: 2237 m; decimalLatitude: -2.922000; decimalLongitude: 29.501117; Event: samplingProtocol: Malaise trap; eventDate: 2010-11-25 / 2010-11-26; habitat: Indigenous Afromontane forest; Record Level : institutionCode: BMSA

Description

Male: Body length 5.2 mm. Wing length 4.0 mm. Colouration (Dry specimen). Head dark brown; eye margin, face and clypeus yellow; labellum yellow; palpus yellow-brown, segments 4-5 dark brown. Antennae with scape and pedicel yellow; flagellum brown, first flagellomere with yellow base. Thorax with scutum brown, pale mesonotal stripes present and anterior and lateral margins broadly yellow; lateral sclerites pale brown to dark brown; propleura brown; halteres whitish-yellow, apically slightly darker. Legs whitish-yellow. Abdomen dark brown, tergites I-III with yellow lateral area. Terminalia pale brown. Head. Frons and vertex covered with short black setae. Clypeus covered with short black setae, evenly distributed; flagellomeres longer than broad, with sixth flagellomere 1.2 times as long as wide. Thorax. Scutum covered with short black setae. Legs. Mid-tibia with 23 anterior, 9 posterodorsal, 10 posterior and 6 posteroventral bristles. Hind tibia with 14 anterodorsal, 8 posterodorsal and 8 posterior bristles. Abdomen. Tergites covered with black setae. Terminalia (Fig. 6). Each part of divided tergite IX apically with about 7 setae, apical seta stout. Gonocoxites evenly covered with setae, except on basoventral third (Fig. 6 a, b). Each GL evenly tapered towards apex, entirely covered with setae, apex with 2 setae (Fig. 6 a, b). Aedaegal guides short, evenly tapered towards rounded apex (Fig. 6 a, b). Hypandrium covered with about 11 setae, apical pair of setae reaching about level of GL apex (Fig. 6 a, b). Hypandrial lobe elongate, each branch basally with large hyaline flap, apical part tapering towards narrow rounded apex (Fig. 6 a). Gonostylus (Fig. 6 c) with DB elongate, apically spathulate with apicoexternal margin slightly expanded, dorsally evenly covered with setae, except on apical third. VB with apical half acuminate, apex acute; with 3 setae, apical seta on apex. IB elongate, expanded area one-third from apex, apically capitate, apex acute, row of 4 setae close to apex. MB elongate, apex rounded, apically with 2 small setae, basal seta close to centre.

Female unknown.

Diagnosis

Distinguished from all species in the E. parva group in having the gonocoxal lobes entirely covered with setae and entire length tapering (Fig. 6 a), in combination with the internal gonostylus branch with 4 setae close to the apex (Fig. 6 c).

Etymology

From afro, relating to the Afrotropical Region and Exechia parva , relating to the resemblance to E. parva .

Distribution

Afrotropical, Burundi (Fig. 4 ).

Biology

Adult collected in afromontane forest (2237 m a.s.l.).

Figures

Figure 4. Distribution map of species in the E. parva group occurring in the Afrotropical Region, based on localities from studied material, type material and DNA barcoded material. Different species are represented by individual colours. Altitudes are indicated in shades from grey (lowland) to white (mountains).